As a controlled contactor control switch is widely used in electrical power transmission and industrial production

As a controlled contactor control switch is widely used in electrical power transmission and industrial production, which directly affect the performance and reliability of the entire power system performance and reliability. Electromagnetic contactor is closed and the key factors in the process of existence arc wear, especially in applications where high power DC arc of contact damage is more serious, the decision to become high-power DC contactor electrical life of breaking. DC  mcb circuit breaker  using conventional hybrid power electronic and mechanical switches connected in parallel method integrated the advantages of both, to achieve mixing without arcing contacts off, but due to the high power electronic  electri cenergy meter  cost, large size, the drive control circuit is complicated, making the process in high power applications do not have a high market value. In this paper, railway locomotive power DC contactor for the study presents a new high-power DC contactor hybrid design approach to contacts in the open, no arc affect the basic design requirements related to the course of action. The new proposed hybrid power DC contactor is closed by the bounce arc elimination circuit, breaking the circuit and eliminate the contact arcing composition itself.